Find 
. Write the answer in polar form with the argument between 0° and 360°z1 = 5(cos 200° + i sin 200°), z2 = 4(cos 50° + i sin 50°)
A. 
(cos 40° + i sin 40°)
B. 
(cos 40° + i sin 40°)
C. 
(cos 150° + i sin 150°)
D. 
(cos 150° + i sin 150°)
Answer: D
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